Reinforced web making machine

ABSTRACT

The technique described is a new method that will substitute usual knitting or weaving in manufacturing of long cloth strips having warp and woof threads. The foundation of this method is a rotary way of forming reinforced web by using of pressing and pulling rollers in a roll stand. Web is reinforced by glued warp and also can be bonded to a dry base strip. There are three machines designed for various jobs depending on material of the yarn, desired quality of the web, speed of production etc.

JIIIY 1974 J. VETROVEC REINFQRCED WEB KING MACHINE 4 Shuts-Sheet 1 Filed Aug. 5. 1972 i974 J. VETRCVEC 3.823.049

REINFORCED WEB KING MACHINE 4 Shoots-Shoot 2 Filed Aug. :5, 1972 July 9, 1974 I J. VETROVEC nsmoacsn was mule mcnm:

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F/GIO Y 1974 J. VETROVEC 3,823,049

REINFORCED WEB MAKING MACHINE Filed Aug. 5, 1972 v Shoots-Sheet 1s 3,823,049 REINFORCED WEB MAKING MACHINE Jan Vetrovec, Glendale, Calif. Oriental Trading Center, 5212 N. Yvonne Ave., San Gabriel, Calif. 91776) Filed Aug. 3, 1972, Ser. No. 277,777 Int. Cl. D04h 3/12 US. Cl. 156-441 6 Claims ABSTRACT OF THE DISCLOSURE The technique described is a new method that will substitute usual knitting or weaving in manufacturing of long cloth strips having warp and woof threads.

The foundation of this method is a rotary way of forming reinforced web by using of pressing and pulling rollers in a roll stand. Web is reinforced by glued warp and also can be bonded to a dry base strip. There are three machines designed for various jobs depending on material of the yarn, desired quality of the web, speed of production etc.

DESCRIPTION OF FIGURES OF THE DRAWING FIG. 1 shows semi-schematically in perspective the principle of a web making machine and basic set up.

FIG. 2 shows in schematic plan view the set up of needles and rollers.

FIG. 3 shows special needles.

FIG. 4 shows other details of the rollers.

FIG. 5 shows protecting covers for rollers.

FIG. 6 shows other optional positions of needles.

FIG. 7 shows an embodiment of web making machine with rotary yarn bobbin.

FIG. 8 another concept of web making machine with steady yarn bobbins.

FIG. 9 shows a way of securing the needles against turning in the embodiment of FIG. 8.

FIG. 10 shows an embodiment of web making machine using planetary bevel gearing.

DETAILED DESCRIPTION Principle of this web making method is winding of the yarn 1 from a rotary carrier 2 on stationary needles 3 that are held in such position that the yarn 1 will under its winding tension slip along the needle 3 and on the end of its path will be caught by a pair of pulling and pressing rollers 4, 5 in the roll stand-FIG. 1. In general the needles 3 deliver the yarn 1 in between the rollers 4, 5 where the yarn 1 will be caught and pressed together with reinforcing warp 6 and base strip 7. Needles 3 are smooth tapered bars being held at included angle 8-FIG.

U nited States Patent 0 2. of 30 to 120 degrees so that the yarn 1 wound on them will tend to slip down their slope. Both needles 3 are extended so that their free and relatively closer ends will be behind meeting line 9 of pressing rollers 4, 5 FIG. 2. In optimum case the needles 3 should not touch the rollers 4, 5 with exception of the design of the machine that will be further mentioned in paragraph of machine concepts.

In certain cases as when fragile synthetic or glass yarn is'handled it becomes useful to replace the above described needles by special slippers or mandrels 20 in the form of part of a cone-FIG. 3.

The web formed by this method is reinforced by glued Warp 6 that is coming in contact with woof yarn 1 and base strip 7 in between the rollers 4, 5. Warp 6 consisting of two or more threads 10 is carried from warp bobbins 11 through the tension devices 12 and dipped into melted heat sensitive glue 13 in glue bath 14, then drawn through the die 15 and brought on upper roller 4FIG. 1. Base strip 7 is in such case brought on lower roller 5 and reinforcing web 16 will have its woof yarn web sandwiched between base strip 7 and reinforcing warp 6.

3,823,049 Patented July 9, 1974 FIG. 4 shows the shape of the rollers 4, 5 and position of the needles 3 (shown in cross section). Lower roller 5 has extended sides 17 of smaller diameter. The middle part of this roller is suggested to be rubber coated to provide more positive catching of the woof yarn 1. If the base strip 7 has to be wider than original width of the web, the base strip 7 will require guides 18 that are placed just above sides 17 of lower roller 5FIG. 4. It is usually satisfactory to drive lower roller 5 only and let the upper one turn by friction, but where it is neces sary both rollers 4, 5 are synchronously driven. Because of the heat transfer from hot glue it is necessary to cool upper roller 4 or both rollers 4, 5 if no base strip 7 is used. Roller(s) can be cooled by coolant from cooling circuit or simply by air (if satisfactory); see air holes 19 in upper roller 4-FIG. 4.

To prevent the yarn 1 to touch the rollers 4, 5 by its free end (end from the carrier 2 to the needle) there are designed special slippery covers 21-FIG. 5 that are mounted to cover the front of both rollers 4, 5. These covers are usually not required if the included angle 8 between the needles is relatively small.

In some cases it also becomes useful to adjust timing of slipping of the yarn 1 by positioning of the needles 3 above and below respectively, a plane common to the intersection between the rolls and the axis of rotation of the carrier 2 as seen in FIG. 6.

There are three embodiments of web making machines. The first-'FIG. 7 where bobbins 22 with yarn 1 are rotating together with the carrier 2 on sleeve-like rotor 23 and the needles 3 are directly supported from outside by shaft 24 fixed to the base 45. The rotor 23 is turnably mounted on this shaft by bearings 25 and can be belt or gear driven.

The second embodiment as seen in FIG. 8 uses the extended ends 17 of lower roller 5 as a support for needles 3 to secure them against turning. Needles 3 are fixed to the support shaft which is turnably placed inside sleevelike rotor 27 so that the shaft 26 and the rotor 27 can independently turn. Rotor 27 is turnably inserted into stator bearings 28 and is belt or gear driven. Rotor 27 has a guide 29 for yarn 1 so that the yarn unwinding from yarn bobbins 22 passes through tension device 30 and bearer 31, enters the guide 29, passes free to the carrier 2 and is wound on needles 3. Shaft 26 with needles 3 is prevented from turning since the free end of one of the needles 3 will lay on extended end 17 of the lower roller 5 when the rotor is in motionFIG. 9. Actually in such case shaft 26 tends to turn in the direction of rotor motion by friction torque from bearings 32 and torque from winding of yarn. The pressure of the needle 3 on the roller 5 should be as small as possible to permit slipping out of yarn loops between the roller and needle. A feature of this machine is that the yarn bobbin 22 stays steady outside of moving parts and lighter rotor 27 can turn faster and yarn bobbins 22 can be connected with reserve 33 by so called pig tail that permits continuous running without stopping to set new yarn bobbins.

To prevent the pressure of the needle against the roller from previous case that can become a serious handicap in handling of some kinds of yarn I developed special concept of web making machine having steady yarn bobbins, light rotor and positive securing of the needles against turning which has a foundation in special planetary bevel gearing mechanism-FIG. 10. Shaft 34 is turnably inserted into sleeve-like rotor 35 by bearings 36 and the rotor 35 is also turnably inserted into stator 37 by bearings 38. Rotor 35 has a guide 39 for yarn 1 and carrier 2. The yarn 1 which is unwinding from bobbins 22 passes through the tension device and enters the guide 39, passes through it to the carrier 2 and is turning is obtained by special planetary bevel gearing consisting of shaft gear 40 fixed to the shaft 34, stator ring gear 41 fixed to the stator 37 and two bevel gears 42, 43 that are mounted on common transverse shaft 44 which is rotatably fitted in the rotor 35 passing through its wall. When the rotor 35 is turning, bevel gears 42, 43 are rolling on shaft gear 40 and stator ring gear 41. By keeping the ratio:

1 is number of teeth of shaft gear 40 a is number of teeth of stator ring gear 41 I is number of teeth of bevel gear 42 L is number of teeth of bevel gear 43 and on condition that stator gear rim 41 is staying still it is clear that the shaft gear 40 and shaft 34 will also remain still independent of rotor motion. Rotor 35 can be belt or gear driven.

The web making method is entirely different from presently known systems in using stationary needles held in slope on which the yarn is wound and where the loops are caught by a pair of pulling and pressing rollers and at same instant reinforced by glued warp threads or stuck to the glued strip. By comparison with the reciprocating yarn carrier and pulling rollers system, rotary carrier winding the yarn on stretched warp or other more complicated systems, naturally my web making method will speed up long strip webbing because of use of rotary motion as a forming motion of the machine. This eliminates a number of moving parts in machine mechanism and simplifies the whole process.

My first concept of web making machine is using commonly known system of rotary yarn bobbins, speed of the production is limited because of the weight and size of the rotor, but second concept has stationary yarn bobbins with option of continuous yarn supply and'very light rotor and the needles are supported in a new light duty positive way. Third concept uses a planetary gearing mechanism that is also a new principle of the rotary webbing machine.

Use of three above described types of machine depends on type of production, desired quality, kind of material used. Web making machines can be added into production lines where formed web will be further processed-coated, pressed, etc.

What is claimed is:

1. A machine for making a reinforcing web having a longitudinal warp and a transverse woof substantially normal thereto comprising: e

a pair of rolls intersecting along a line;

a pair of guide members each having a free end slightly beyond an end of the intersection line betweenthe rolls, said guide members diverging towards an end remote from the rolls and on the opposite sidethereof from the free end, each guide member having an outwardly facing surface for slidably receiving a means for feeding a plurality of warp threads around oneof the rolls into and transverse to the line of intersection; and

means for applying an adhesive to the warp threads.

2. A web making machine as defined in Claim 1 wherein the means for applying an adhesive'comprisesmeans for applying a melted adhesive; and further comprising: means for cooling'at least one of the rolls for solidifying the adhesive.

3. A web making machine as defined in Claim 1 wherein the guide members are skewed out of the plane defined by the line of intersection of the rolls and the axis of rotation of the carrier, one of the guide members being above the plane and the other guide member being below the plane.

4. A web making machine as defined in Claim 1 wherein the means for supplying woof thread is fixed inposition, and further comprising:

means for mounting the guide members rotatable relative to the carrier and coaxial therewith;

an end portion on one of the rolls extending beyond the end of the other roll; and wherein the end of at least one of the guide members rests on the extending end portion of the roll.

5. A web making machine as defined in Claim 1 wherein the means for supplying a woof thread is fixed in position, and further comprising:

a shaft supporting the guide members;

means for mounting the shaft rotatable relative to and coaxial with the carrier;

at bevel gear on the shaft;

a ring gear fixed in position coaxial with the shaft and carrier; and

a bevel gear train mounted on the carrier .for rotation about an axis transverse to the axis of rotation of the carrier and having a first bevel gear engaging the ring gear and a second bevel gear engaging the bevel gear on the shaft for preventing rotation of the shaft irrespective of rotation of the carrier thereabout.

6. A web making machine as defined in Claim 1 wherein the means for supplying woof thread comprises means for mounting a thread bobbin on the carrier for rotation therewith, and further comprising:

a shaft coaxial with the carrier connected at one end to the guide members and fixed in position at the DANIEL J. FRITSCH, Primary Examiner 7 s. 01. X.R. 

